Battery Sizer- Backup Batteries for UPS

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Battery Bank Sizing, Backup Battery, for home, offices ..

calculate the needed battery size

How to choose the right size battery bank for your solar system.

Determining a Battery's Storage Capacity

An important part of solar battery sizing is determining the storage capacity, so you know how long you can use it for.

Sizing a Battery Bank - Watt Hours

Let's say you go out and buy a battery for your solar system that is 12 volts (push) and 105 amp hours (storage capacity).

You could find out approximately how much energy this battery will store / provide by calculating the watt hours. To do this, just multiply the volts (V) x the amp hours (AH) and divide by 100.

Volts x Amp Hours / 100 = Watt Hours

12V x 105AH = 1260 / 100 = 12.6 Watt Hours

What this means is that you can power a 100 watt appliance for 12.6 hours on a fully charged battery.

Make sure you find out what the specs on your batteries are before buying them. By knowing what to look for and what each spec means, you can insure your solar project's battery bank operates smoothly, efficiently and free of costly "battery bank sizing" mistakes.

Battery Life Expectancy

One thing you want to pay close attention to when solar battery sizing is how long the batteries you buy will last. The life expectancy of a sealed lead acid battery is rated using the number of cycles that battery can perform.

The "number of cycles" refers to the number of times the battery can be charged and discharged before it's dead.

So if your battery is a 3000 cycle battery, this means it can be charged and discharged 3000 times before it dies, that is providing it is consistently charged correctly and not discharged past acceptable levels. Batteries are considered to be at the end of their lifespan when 20% of their original capacity is gone.